mg/L

Species

Effects

Ref.

0.02

barley

root damage in nutrient culture

Bale & Hart, 1973

0.5

Cordyline terminalis

leaf damage in nutrient culture

Conover & Poole, 1971

10.0

peach/tomato/buckwheat

no injury

Leone et al., 1948

100

peach/buckwheat

severe injury

Anon, 1949

180

buckwheat

no injury at pH 5.5

Prince et al., 1949

200

peach/tomato/ buckwheat

killed in a short time

Leone et al., 1948

360

peach/buckwheat

injurious at pH 6.5

McClure, 1949

1000

beans

stunted growth

Anon, 1949